Can see why they might have struggled to get their anchor to hold in the 1st place

If your on about the rib
I think the anchor held ok

It was more like the person in the bow handling the anchor line that was trying to take up loads of slack and not getting at least a few turns around a cleat to stop/and hold the boat whilst the wave passed ,

When the wave knocked them off balance the line went slack causing the boat to come beam on ,if you look even the helm stands up & tries to have a go in vain at holding the boat ,
I doubt given the size of the wave even 2 people would not have held the boat
As I said about the rnli,s method of veering earlier in the thread and the importance of having the line tight in such conditions & a proper closed bow fair lead for the anchor line to run through & cleat or Samson post to jam or stop off ,

if you look in the Rnli video everything's under control
the bow/ anchor man is sat down in the bow
(less chance of loosing balance )keeping taut & paying out the anchor line with a couple of turns around the cleat ready to jam /"stop off" should a large wave approach ,

Ok i wasn't there at the time so can only make an educated guess but its food for thought for others in a similar circumstance .

I don't think that was their anchor line, that looked like the line that was also wrapped around their prop which got them into the problem in the first place - apart from trying something pointless in the first place!

I don't think that was their anchor line, that looked like the line that was also wrapped around their prop which got them into the problem in the first place - apart from trying something pointless in the first place!

+1. I'm pleased that it's not just me that thought it was pointless !!